The program comes as early data shows the Oxford/AstraZeneca vaccine is less effective against the South African variant of COVID-19.
The U.K. has ordered 100 million doses of the vaccine, enough to vaccinate 50 million people.
There are hopes it could be key to curbing the pandemic in many low- and middle-income countries due to its low cost.
Experts hailed the findings of the preliminary study as older people are more vulnerable to complications from COVID, and usually less likely to respond to vaccines.
The pause serves as a "wake-up call" for those eagerly awaiting a vaccine, the chief scientist at the World Health Organization said.
Pharmaceutical giant Sinophram has priced their vaccine candidate at $145, the most expensive vaccine quote yet.
Cecil Rhodes founded the De Beers diamond company, which at one point had monopoly over the diamond trade.
The protesters can be heard chanting "decolonize" and for the statue of Cecil Rhodes to be taken down.
Scientists asked subjects to ask their ex and current partners about their personalities.
Popular stories about Saint Nicholas served as an inspiration for the legend of Father Christmas in the 16th century.
They were last seen driving a rented gray 2017 Hyundai sedan.
The history faculty said it was "pleased to be modernizing and diversifying our curriculum in this way" but activists said the changes did not go far enough.
"To prevent this extraordinary able young lady from not following her long-held desire would be too severe," said Judge Ian Pringle.
The university aims to "redress the balance" that favored "dead white males" in the past.
Academics say the U.K.'s vote to leave the EU is still a big threat to the sector.
Britain's share of funding into research projects is no longer guaranteed.
Malia Bouattia's critics say that she holds anti-Semitic views.
Oxford scientists find electric current boosts stroke recovery.
In April last year, the University of Cape Town pulled down its statue of the British imperialist.
'The College Dropout' addresses the faculty at Oxford University.